Port xxd.pl to xxd.py (Perl to Python)

Source/build/scripts/xxd.py

-#!/usr/bin/python
-#
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
 # in the documentation and/or other materials provided with the
 # distribution.
 #     * Neither the name of Google Inc. nor the names of its
 # contributors may be used to endorse or promote products derived from
 # this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+"""Represent a file as a C++ constant string."""
+
+import optparse
 import sys
 
-from webkitpy.common import host
-from webkitpy.layout_tests import print_layout_test_types
 
-print_layout_test_types.main(host.Host(), sys.argv[1:])
+def parse_arguments():
+    parser = optparse.OptionParser()
+    _, args = parser.parse_args()
+    return args

[Nico, 2013/10/25 04:14:31]

Why not just `return sys.argv[1:]`? What does the optparse add?

[Nils Barth (inactive), 2013/10/25 07:22:36]

Good point, thanks!
I was just using optparse by default,
but you're right, it's not needed here.

+
+
+def main():
+    variable_name, input_filename, output_filename = parse_arguments()
+    with open(input_filename) as input_file:
+        input_text = input_file.read()
+    hex_values = ['0x{:02x}'.format(ord(char)) for char in input_text]
+    output = 'const unsigned char %s[] = {\n%s\n};\n' % (
+        variable_name, ', '.join(hex_values))
+    with open(output_filename, 'w') as output_file:
+        output_file.write(output)
+
+
+if __name__ == '__main__':
+    sys.exit(main())